# Bone Ninja Sensei

> Educational app for surgeons to analyze and plan long bone deformity correction. (iPhone/iPad app by LifeBridge Health.)

- Source: https://appshunter.io/ios/app/bone-ninja-sensei/id6450483301 (this page in markdown: same URL + `.md`)
- Developer: [LifeBridge Health](https://appshunter.io/developer/460335164)
- Category: Medical, Education
- Price: Free with in-app purchases
- Rating: 4.50/5 from 2 App Store ratings · 4 written reviews indexed
- Age rating: 4+
- Requires: iOS 11.4 · 48 MB
- Languages: English
- Released: 2023-08-15
- Data updated: 2026-06-01
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/bone-ninja-sensei/id6450483301/reviews.md

## What is Bone Ninja Sensei?

Bone Ninja is a teaching tool developed by two orthopedic surgeons who specialize in limb deformity correction: Dr. Shawn Standard and Dr. John Herzenberg. It is designed to help surgeons learn to analyze long bone deformities. Bone Ninja comes pre-loaded with radiographs of normal legs and deformed legs. You can analyze the provided cases or upload your own. Once your analysis is complete, you can then use the cut-out tool to try different osteotomy solutions. Suggested solutions for the provided cases are available for comparison.


Bone Ninja includes tools for drawing lines, measuring angles, measuring lengths, and calibrating the magnification. The cutting tool allows you to manipulate one or more fragments to simulate correction of single or multilevel deformities. The analysis of the radiographs is based on methodology taught at our annual Baltimore Limb Deformity Course (BLDC), now in its 22nd year (DeformityCourse.com). We developed this app to supplement the BLDC and look forward to feedback from attendees and other users. Bone Ninja is not presented as a clinical tool, but rather an educational tool. It will not “automatically” analyze deformities. The student must first learn the methodology of analyzing and planning deformity correction in order to use Bone Ninja. Bone Ninja is a 21st century mobile alternative to pencil, ruler, goniometer, and paper. 


Bone Ninja will be periodically updated by adding more case examples, more explanations, and more tools. The name “Bone Ninja” is intentionally whimsical and reflects our philosophy of teaching as “infotainment.” Enjoy!


Disclaimer
The Bone Ninja App is designed for educational purposes only. The intent is to train physicians how to analyze long bone deformities. The Bone Ninja App is not intended to be used for medical diagnosis or treatment. In view of the possibility of human error or changes in medical science, neither the authors nor the developer warrant that the information contained in this software is accurate or complete and they are not responsible for any errors or omissions or the results obtained from the use of such information.

Terms of Use and Privacy Policy: https://www.lifebridgehealth.org/main/terms-of-use-and-privacy-policy

## Key features

- Analyze long bone deformities
- Radiograph analysis tools
- Simulate osteotomy solutions
- Upload custom radiographs
- Drawing and measuring tools
- Educational case examples

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Annual Subscription Plan | $14.99 | per year |


## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/bone-ninja-sensei/id6450483301/reviews.md

### 2/5 — Can’t add photos when running on MacOS

*2025-08-25, version 1.0.1*

I installed the app on my MacBook M1, but I can’t add photos?

### 3/5 — Screen Rotation

*2024-05-15*

For me it’s a very good app, but it should have an automatic screen rotation to landscape mode, to be used with a keyboard.

### 5/5 — Incredible tool

*2024-01-27, version 1.0.1*

I started using the original Bone Ninja app when it launched several years ago.  I wasn’t sure how they could improve the original version because it was so helpful, but there have been some great improvements. Some of the changes that I really like are (1) the ability to measure an angle between any two lines even if they do not intersect; (2) the ability to change the thickness of lines; (3) the ability to switch between a lower extremity measurement panel and a foot and ankle measurement panel to record values when analyzing a deformity.  It’s a great tool if you’re just learning how to analyze deformity and plan corrections, but its also an adjunct to clinical practice for the more experienced deformity surgeon. I routinely use this app to plan out corrections and use these plans both for myself (take to the OR) and to help explain to patients and families the underlying problem and the strategy for treatment.  The only downside is that there is not an android version of this tool for learners and surgeons who do not have access to an ipad.

### 2/5 — Keeps crashing

*2023-10-15*

This is a really helpful app when it works but it keeps crashing before I can complete my planning

**Developer response:** We are sorry to learn you are experiencing difficulties with our app. We have a few troubleshooting steps we would recommend:
1. Please check to see if you have the latest  iOS Operating System which is currently 16.7.2.
2. If you do not have the latest iOS, please: 
A. Uninstall Bone Ninja Sensei
B. Update to the latest iOS version
C. Restart your iPad
D. Then reinstall Bone Ninja Sensei

3. If you still have an issue when working with an image you added from the "Add Photo," the problem can be a download problem. The image being used could be a smaller version, not the full version of the image on the Cloud. Here are steps to try:
A. Please change photo preferences in settings from Automatic to Keep Originals. This will help with downloading an image from the iCloud in the future.
B. If you do not have space on your iPad to "Keep Originals," then be sure to allow the whole image to download and place the photo in your Bone Ninja Photo Album before selecting the image in the app.
C. If you are using a photo taken on your iPad, save the photo in your Bone Ninja Photo Library, then "Add Photo" from within the app.

We hope these tips help!

## Frequently asked questions about Bone Ninja Sensei

### What is Bone Ninja Sensei?

Bone Ninja Sensei is an educational tool developed by orthopedic surgeons to help medical professionals learn how to analyze long bone deformities. It offers tools for drawing, measuring, and simulating correction solutions on radiographs.

### Who is Bone Ninja Sensei for?

Bone Ninja Sensei is designed for surgeons and medical students who specialize in limb deformity correction. It serves as a supplementary tool for learning the methodology of analyzing and planning deformity correction.

### Can I use my own X-rays with Bone Ninja Sensei?

Yes, you can upload your own radiographs of normal or deformed legs to analyze within Bone Ninja Sensei. This allows for personalized practice and application of the learned methodologies.

### Does Bone Ninja Sensei automatically analyze deformities?

No, Bone Ninja Sensei is an educational tool and does not automatically analyze deformities. Users must first learn the methodology of analysis and planning to effectively use the app's features.

### What kind of tools are available in Bone Ninja Sensei?

Bone Ninja Sensei includes tools for drawing lines, measuring angles and lengths, calibrating magnification, and a cutting tool to simulate osteotomy solutions for deformity correction.

### Is Bone Ninja Sensei a clinical tool?

No, Bone Ninja Sensei is strictly an educational tool and is not presented as a clinical tool for medical diagnosis or treatment. Its purpose is to train physicians in analyzing bone deformities.

### What is the pricing for Bone Ninja Sensei?

Bone Ninja Sensei is available for free. It also offers an Annual Subscription Plan for $14.99 per year, which includes a one-month free trial.

### How often is Bone Ninja Sensei updated?

Bone Ninja Sensei will be periodically updated by the developers. These updates will include adding more case examples, explanations, and tools to enhance the learning experience.

## Version history (last 2 releases)

### 1.0.1 — 2023-11-27

Bug fixing: Crash occurs when using the Cut Tool on user-uploaded images

### 1.0 — 2023-08-15

No release notes.

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## More apps by LifeBridge Health

- [Multiplier](https://appshunter.io/ios/app/multiplier/id460335161)
- [Multiplier HD](https://appshunter.io/ios/app/multiplier-hd/id460343565)
- [Bone Ninja](https://appshunter.io/ios/app/bone-ninja/id554151432)
- [LifeBridge Health](https://appshunter.io/ios/app/lifebridge-health/id1611570941)

All apps by LifeBridge Health: https://appshunter.io/developer/460335164

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*